Submitted on: 12 August 2017.
Revised on: 28 November 2017.
Accepted on: 18 December 2017.
___________________EASTERN MEDITERRANEAN HEALTH JOURNAL
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Submitted on: 19 August 1999.
Revised on: 16 October 1999.
Accepted on: 28 October 1999.
___________________EASTERN MEDITERRANEAN HEALTH JOURNAL
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